It seems the login Queue was getting overfull and crashing, so now they only accept so many in every 3-5 minutes. After each batch is let in, you will get the "Server is Full" message for a few minutes, then they accept another batch of players to the login queue. Constant clicking has gotten me in within 5 minutes all day (on my NA Legacy server).

Sorry to hear that. That's why I went randomly exploring on the JP servers on Sunday. Found some cool things just running past higher level mobs.. The dancing Mithras are North of Costa Del Sol in La Noscea.